The new Entry/Exit System, known as EES, has been slowly rolled out across Europe - and a major airline has warned this summer could be affected by delays as a result.

Fifteen destinations in particular are facing major airport delays as the EU's new digital passport checks are causing 'slow processing times and excessive queues,' Ryanair warned

Aviation enthusiast and reporter Zach Griff used flight schedule data to map out the busiest times at border control in Schengen airports

The new Entry/Exit System, known as EES, has been slowly rolled out across Europe - and a major airline has warned this summer could be affected by delays as a result.